step one

This is a function

thingdoer(a, b, c)

Move the opening bracket over to the beginning

(thingdoer, a, b, c)

Congrats, you have a list that happens to be a statement

(thingdoer a b c)

step two

((indent
    (your-shit) properly)
  (stop-worrying-about
    (parentheses))
  (like (literally
    just-ignore-them)))

Although it helps to know that if you use a good editor, when you put your cursor over one parentheses end the editor highlights the other end automatically.